Carel c.pCO User Manual

31
ENG
c.pCO sistema +0300057EN rel. 1.2 - 29.05.2017
The fast digital input can be used as a frequency meter. The count is
performed on the rising edge of the pulse. The pulse generator device
will have one digital output with transistor optocoupler, which will be
connected to the input as shown in the gure. For details on the input
signal see the Technical Specications table (see chap. 12).
Note: the application program shows the frequency values using
specic variables. If the inputs are congured as counters, the counter is
reset by the application program.
Example:
t
t
input
count
Fig. 5.k
Note: in the case of fans with current output and high series
resistance, the reading of the pulses may depend on the current. The
current value can be congured in the c.design I/O Editor.
Connecting non-optically-isolated analogue outputs
There is no particular restriction on the number of outputs that can
be connected. For details on the output signal see the Technical
Specications table (see chap. 12).
Example: analogue/PWM output connection diagram.
U1 U2 U3 GND +VDC
+Vterm GND
+5 V
REF
U4 GND U5 GND
VG VG0 Y1 Y2 Y3 Y4
ID1
J24 J2 J3
J4
ID1
Vout
Vout
Fig. 5.l
Key
Controller terminals Description
U1
Analogue output 1
GND
U2
Analogue output 2
GND
U3
Analogue output 3
GND
Note: the analogue outputs cannot be connected in parallel.
5.3 Digital inputs
The controller features digital inputs for connecting safety devices, alarms,
device status indicators and remote switches. See the table of technical
specications for the maximum cable length cables (see chap. 12).
c.pCOmini
The digital inputs are not optically-isolated and have voltage-free
contacts. The following gure shows how to connect the digital inputs:
U1 U2 U3 GND U4
U5
U6 GND U7 U8 U9 U10
GND
J1
G
G0
Vbat
+5VREF
GND
+V DC
J9
Y1
GND
ID2
ID1 Y2
GND
J8
J7
J2
Fig. 5.m
c.pCO Small...Extralarge
These inputs are all optically isolated from the other terminals. They can
work at 24 Vac (+10/-15%) or 28 to 36 Vdc (-20/+10%) (indicated as ID*),
and some at 230 Vac (indicated as IDH*), see as reference gure below.
Note:
• if the control voltage is drawn in parallel with a coil, install a dedicated
RC lter in parallel with the coil (typical ratings are 100 , 0.5 µF, 630 V);
• if the digital inputs are connected to safety systems (alarms), the
presence of voltage across the contact should be taken as the normal
operating condition, while no voltage represents an alarm situation.
This will ensure that any interruption (or disconnection) of the input
will also be signalled;
• do not connect the neutral in place of an open digital input;
• always interrupt the phase.
Important:
• to avoid electromagnetic interference, keep the probe and digital
input cables separate from the power cables as much as possible (at
least 3 cm). Never run power cables and probe signal cables in the
same conduits (including the ones in the electrical panels.
24 Vac digital inputs (c.pCO Small... Extralarge only)
Digital inputs ID... can be controlled at 24 Vac.
Note:
• the digital inputs are only functionally isolated from the rest of the
controller;
• to keep the digital inputs optically isolated a separate power supply is
needed for each input;
• the digital inputs can be powered at a dierent voltage from the rest
of the controller.
Cable cross-section
For remote connections to the digital inputs (length <50 m), use cables
with a cross-section = 0.25 (mm
2
)
Important: If the controller is installed in an industrial environment
(standard EN 61000-6-2) the connections must be less than 30 m long. Do
not exceed this length to avoid measurement errors.

Carel c.pCO Specifications

General

Brand	Carel
Model	c.pCO
Category	Controller
Language	English